TM
MP2305 – 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 12V, VO = 3.3V, L = 10µH, C1 = 10µF, C2 = 22µF, TA = +25°C, unless otherwise noted.
Shutdown through Enable
Startup through Enable
Steady State Test
V
I
= 12V, V
= 3.3V
= 1A (Resistance Load)
V
I
= 12V, V
= 3.3V
= 1A (Resistance Load)
V
I
= 12V, V
OUT
= 3.3V
IN OUT
IN
OUT
IN
= 0A, I = 8.2mA
OUT
OUT
OUT
IN
V
IN
V
20mV/div.
V
EN
5V/div.
EN
5V/div.
V
OUT
V
V
OUT
OUT
20mV/div.
2V/div.
2V/div.
I
L
1A/div.
I
L
I
L
1A/div.
1A/div.
V
SW
V
SW
V
10V/div.
SW
10V/div.
10V/div.
2ms/div.
2ms/div.
MP2305-TPC03
MP2305-TPC01
MP2305-TPC02
Light Load Operation
No Load
Heavy Load Operation
2A Load
Medium Load Operation
1A Load
V
V
IN, AC
IN, AC
V
IN, AC
200mV/div.
20mV/div.
200mV/div.
V
V
O, AC
O, AC
V
O, AC
20mV/div.
20mV/div.
20mV/div.
I
L
I
I
L
L
1A/div.
1A/div.
1A/div.
V
V
V
SW
SW
SW
10V/div.
10V/div.
10V/div.
MP2305-TPC04
MP2305-TPC05
MP2305-TPC06
Short Circuit
Recovery
Load Transient
Short Circuit
Protection
V
OUT
V
V
OUT
OUT
2V/div.
2V/div.
200mV/div.
I
L
1A/div.
I
L
2A/div.
I
L
I
2A/div.
LOAD
1A/div.
MP2305-TPC07
MP2305-TPC08
MP2305-TPC09
MP2305 Rev. 1.7
4/17/2006
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4
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